must yock
Verbo regular: yock - yocked- yocked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must yock
you must yock
he must yock
we must yock
you must yock
they must yock 	I must be yocking
you must be yocking
he must be yocking
we must be yocking
you must be yocking
they must be yocking	I must have yocked
you must have yocked
he must have yocked
we must have yocked
you must have yocked
they must have yocked	I must have been yocking
you must have been yocking
he must have been yocking
we must have been yocking
you must have been yocking
they must have been yocking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not yock
you must not yock
he must not yock
we must not yock
you must not yock
they must not yock 	I must not be yocking
you must not be yocking
he must not be yocking
we must not be yocking
you must not be yocking
they must not be yocking	I must not have yocked
you must not have yocked
he must not have yocked
we must not have yocked
you must not have yocked
they must not have yocked	I must not have been yocking
you must not have been yocking
he must not have been yocking
we must not have been yocking
you must not have been yocking
they must not have been yocking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I yock?
must you yock?
must he yock?
must we yock?
must you yock?
must they yock? 	must I be yocking?
must you be yocking?
must he be yocking?
must we be yocking?
must you be yocking?
must they be yocking? 	must I have yocked?
must you have yocked?
must he have yocked?
must we have yocked?
must you have yocked?
must they have yocked? 	must I have been yocking?
must you have been yocking?
must he have been yocking?
must we have been yocking?
must you have been yocking?
must they have been yocking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not yock?
must you not yock?
must he not yock?
must we not yock?
must you not yock?
must they not yock? 	must I not be yocking?
must you not be yocking?
must he not be yocking?
must we not be yocking?
must you not be yocking?
must they not be yocking? 	must I not have yocked?
must you not have yocked?
must he not have yocked?
must we not have yocked?
must you not have yocked?
must they not have yocked? 	must I not have been yocking?
must you not have been yocking?
must he not have been yocking?
must we not have been yocking?
must you not have been yocking?
must they not have been yocking?